In my searching for info, I came across the following for FIBA (highlighting mine)...
http://www.theeboa.com/tools/2010-20...renceChart.pdf
Shot Clock
24 seconds.
Ball must be released prior to sounding of horn and subsequently hit rim.
NEW: On a throw in – clock starts as soon as any player touches or is touched by the ball on the court.
If horn sounds – don’t blow whistle and wait to see what happens = if shot doesn’t hit rim or go in, or defense gets immediate control, no whistle, play continues.
Throw in for a shot clock violation is nearest to the spot where the shot was taken.
Shot clock is reset or sounds in error – official may correct it. If sounds in error, try to ignore the horn as long as neither team placed at a disadvantage.
There are a couple of statements that related to what we're discussing here. Sure, its FIBA, but I felt it still worth mentioning since FIBA has been making moves to be more like the various US rules.